XMPP-based server with plug-in architecture and easy-to-manage interface (www.jivesoftware.com)
Microsofts Office Live Communications Server 2005
Windows-based IM platform that has tight integration with Active Directory (www.microsoft.com)
Omnipods Professional Online Desktop
Hosted IM service with support for logging and archiving (www.omnipod.com)
Wired Red Softwares e/Pop Secure Instant Messaging
IM application that can be configured with integrated desktop and application sharing (www.wiredred.com)
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